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Thank you for posting your question,
In terms of the classic universal login, please check this knowledge solution → How to use Passwordless, Database and Social connections in the same classic universal login page
Unfortunately, Universal Login does not directly support having both Passwordless and Password in the same login user interface. However, you can pass the “connection” parameter when calling Auth0 so that the Universal login prompt will know in advance which connection will be used.
For example, you can add the parameter “connection=sms” to the /authorize request, and the new universal login will use SMS otp passwordless in those attempts. Alternatively, you may also send a “password” connection to the /authorize request. This approach would require you to know in advance (before calling auth0) which connection the user wants to use.
Thanks
Dawid